Thanks. I’m keen to find the problem rather than plaster over! Occasionally I have seen some other machines triggering this. So far only things claiming to be Safari (so could be a bot using a different client string, but dunno).
Either ahrefs isn’t asking for the same files again in the same way, or something else, but the problem has become less frequent over time (but ahrefs still seems to be requesting jpgs, only the effect doesn’t happen for all requests… Perhaps only once, the very first time? But if so why?)
